Quote:
Originally Posted by wd40addict
Most old school service generators had a fixed AM setting of 400Hz at 30% modulation depth. Turn this on and sweep freq around 45MHz and you should see something on the screen.
Sweep around 41.5MHz and you should hear the tone.
Note the above frequencies assume your TV22 is set to London Ally Pally frequencies.
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I tried the above with the sig gen connected to the aerial terminals on the r.f. deck via a dummy aerial pad I made for radio work. So far I can't get any response from video or audio. There are still about 4 wax capacitors in the r.f. deck so I'm focusing on replacing those and checking the remaining resistors for now.
Once all components have been checked I'll revisit it and do some voltage checks signal tracing. Hopefully the tuner is ok despite the missing knob.